The belly flab is so different from the state of the belly when pregnant that it is not easily distinguishable from the outside when wearing clothes. The flab can be in the form of strips or many folds on the belly and the patient does not have a history of menopause. In pregnancy, the belly enlarges uniformly and does not have many folds. A woman can clearly find the gestational sac or fetus in the uterine cavity with an ultrasound examination, which can determine that it is a pregnancy. Whether the abdomen enlarges during pregnancy or obesity leads to an increase in belly fat, women can show a bulging abdomen that is not easily distinguishable in appearance, while pregnant women may show facial stretch marks, breast enlargement, and deepening of nipple and areola color.